package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.Employee;
import com.itheima.reggie.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.DigestUtils;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.*;

import javax.naming.Name;
import javax.servlet.http.HttpServletRequest;
import java.time.LocalDateTime;

@Slf4j
@RestController
@ResponseBody
@RequestMapping("/employee")
public class EmployeeController {

    @Autowired
    private EmployeeService employeeService;

    /**
     * 员工登录
     *
     * @param request
     * @param employee
     * @return
     */
    @PostMapping("/login")
    public R<Employee> login(HttpServletRequest request, @RequestBody Employee employee) {
        // 1、将页面提交的密码password进行md5加密处理
        String password = employee.getPassword();
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        // 2、根据页面提交的用户名username查询数据库
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(Employee::getUsername, employee.getUsername());
        Employee emp = employeeService.getOne(queryWrapper);
        // 3、如果没有查询到则返回登录失败结果
        if (emp == null) {
            return R.error("该账号不存在!");
        }
        // 4、密码比对，如果不一致则返回登录失败结果
        if (!emp.getPassword().equals(password)) {
            return R.error("密码错误!");
        }
        // 5、查看员工状态，如果为已禁用状态，则返回员工已禁用结果
        if (emp.getStatus() == 0) {
            return R.error("账号已禁用!");
        }
        // 6、登录成功，将员工id存入Session并返回登录成功结果
        request.getSession().setAttribute("employee", emp.getId());
        return R.success(emp);
    }

    /**
     * 员工退出
     *
     * @param request
     * @return
     */
    @PostMapping("/logout")
    public R<String> logout(HttpServletRequest request) {
        // 清理Session中保存的当前登录员工的id
        request.getSession().removeAttribute("employee");
        return R.success("退出成功!");
    }


    /**
     * 新增员工
     *
     * @param emp
     * @return
     */
    @PostMapping
    public R<String> save(HttpServletRequest request, @RequestBody Employee emp) {
        log.info("新增员工信息:{}", emp.toString());
        emp.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));
        // emp.setCreateTime(LocalDateTime.now());
        // emp.setUpdateTime(LocalDateTime.now());
        Long empId = (Long) request.getSession().getAttribute("employee");
        // emp.setCreateUser(empId);
        // emp.setUpdateUser(empId);
        if (empId != 1L) {
            return R.error("非管理员无法新增员工！");
        }
        employeeService.save(emp);
        return R.success("新增员工成功!");
    }


    /**
     * 分页条件查询
     *
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name) {
        log.info("page={},pageSize={},name={}", page, pageSize, name);
        // 构造分页构造器
        Page pageInfo = new Page(page, pageSize);
        // 构造条件构造器
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper();
        // 添加过滤条件
        queryWrapper.like(null != name, Employee::getName, name);
        // 添加排序条件
        queryWrapper.orderByDesc(Employee::getCreateTime);
        // 执行查询
        employeeService.page(pageInfo, queryWrapper);

        return R.success(pageInfo);
    }


    /**
     * 启用或禁用员工
     *
     * @param request
     * @param emp
     * @return
     */
    @PutMapping
    public R<String> enableOrDisableEmployee(HttpServletRequest request, @RequestBody Employee emp) {
        log.info("扩展消息转换器....");
        Long empId = (Long) request.getSession().getAttribute("employee");
        // emp.setUpdateTime(LocalDateTime.now());
        // emp.setUpdateUser(empId);
        employeeService.updateById(emp);
        return R.success("修改员工信息成功!");
    }


    /**
     * 根据id查询员工信息
     *
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<Employee> getById(@PathVariable Long id) {
        log.info("根据id:{}查询员工信息", id);
        Employee employee = employeeService.getById(id);
        if (employee != null) {
            return R.success(employee);
        }
        return R.error("没有查询到相应员工信息!");
    }
}
